Why would you need to do that? Most likely you’ve arrange a WordPress website online for a consumer and also you don’t need them mindlessly upgrading with out figuring out the compatibility in their theme or plugins. Poorly achieved upgrades may cause a number of problems that you are going to probably be referred to as upon to mend.
Upload this consistent in your wp-config.php report to disable plugin and theme updates/set up:
For those who suppose it’s a terrible injustice to disable plugin and theme updates, this tip involves you immediately from the WordPress codex – it’s a integrated consistent. Be happy to make use of it as vital.
WordPress Developers